<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-type" content="text/html;charset=UTF-8">
<script type="text/javascript" src="http://cdn.mathjax.org/mathjax/latest/MathJax.js?config=TeX-AMS-MML_HTMLorMML"> </script>
<script type="text/x-mathjax-config">MathJax.Hub.Config({"tex2jax": {"inlineMath": [['$','$'], ['\\(','\\)']]}});</script>
<script type="text/x-mathjax-config">MathJax.Hub.Config({"HTML-CSS": {"availableFonts":["TeX"],"scale": 150}});</script>

<style>
/*---------------------------------------------------------------------------------------------
 *  Copyright (c) Microsoft Corporation. All rights reserved.
 *  Licensed under the MIT License. See License.txt in the project root for license information.
 *--------------------------------------------------------------------------------------------*/

body {
	font-family: "Segoe WPC", "Segoe UI", "SFUIText-Light", "HelveticaNeue-Light", sans-serif, "Droid Sans Fallback";
	font-size: 14px;
	padding: 0 12px;
	line-height: 22px;
	word-wrap: break-word;
}

#code-csp-warning {
	position: fixed;
	top: 0;
	right: 0;
	color: white;
	margin: 16px;
	text-align: center;
	font-size: 12px;
	font-family: sans-serif;
	background-color:#444444;
	cursor: pointer;
	padding: 6px;
	box-shadow: 1px 1px 1px rgba(0,0,0,.25);
}

#code-csp-warning:hover {
	text-decoration: none;
	background-color:#007acc;
	box-shadow: 2px 2px 2px rgba(0,0,0,.25);
}


body.scrollBeyondLastLine {
	margin-bottom: calc(100vh - 22px);
}

body.showEditorSelection .code-line {
	position: relative;
}

body.showEditorSelection .code-active-line:before,
body.showEditorSelection .code-line:hover:before {
	content: "";
	display: block;
	position: absolute;
	top: 0;
	left: -12px;
	height: 100%;
}

body.showEditorSelection li.code-active-line:before,
body.showEditorSelection li.code-line:hover:before {
	left: -30px;
}

.vscode-light.showEditorSelection .code-active-line:before {
	border-left: 3px solid rgba(0, 0, 0, 0.15);
}

.vscode-light.showEditorSelection .code-line:hover:before {
	border-left: 3px solid rgba(0, 0, 0, 0.40);
}

.vscode-dark.showEditorSelection .code-active-line:before {
	border-left: 3px solid rgba(255, 255, 255, 0.4);
}

.vscode-dark.showEditorSelection .code-line:hover:before {
	border-left: 3px solid rgba(255, 255, 255, 0.60);
}

.vscode-high-contrast.showEditorSelection .code-active-line:before {
	border-left: 3px solid rgba(255, 160, 0, 0.7);
}

.vscode-high-contrast.showEditorSelection .code-line:hover:before {
	border-left: 3px solid rgba(255, 160, 0, 1);
}

img {
	max-width: 100%;
	max-height: 100%;
}

a {
	color: #4080D0;
	text-decoration: none;
}

a:focus,
input:focus,
select:focus,
textarea:focus {
	outline: 1px solid -webkit-focus-ring-color;
	outline-offset: -1px;
}

hr {
	border: 0;
	height: 2px;
	border-bottom: 2px solid;
}

h1 {
	padding-bottom: 0.3em;
	line-height: 1.2;
	border-bottom-width: 1px;
	border-bottom-style: solid;
}

h1, h2, h3 {
	font-weight: normal;
}

h1 code,
h2 code,
h3 code,
h4 code,
h5 code,
h6 code {
	font-size: inherit;
	line-height: auto;
}

a:hover {
	color: #4080D0;
	text-decoration: underline;
}

table {
	border-collapse: collapse;
}

table > thead > tr > th {
	text-align: left;
	border-bottom: 1px solid;
}

table > thead > tr > th,
table > thead > tr > td,
table > tbody > tr > th,
table > tbody > tr > td {
	padding: 5px 10px;
}

table > tbody > tr + tr > td {
	border-top: 1px solid;
}

blockquote {
	margin: 0 7px 0 5px;
	padding: 0 16px 0 10px;
	border-left: 5px solid;
}

code {
	font-family: Menlo, Monaco, Consolas, "Droid Sans Mono", "Courier New", monospace, "Droid Sans Fallback";
	font-size: 14px;
	line-height: 19px;
}

body.wordWrap pre {
	white-space: pre-wrap;
}

.mac code {
	font-size: 12px;
	line-height: 18px;
}

pre:not(.hljs),
pre.hljs code > div {
	padding: 16px;
	border-radius: 3px;
	overflow: auto;
}

/** Theming */

.vscode-light,
.vscode-light pre code {
	color: rgb(30, 30, 30);
}

.vscode-dark,
.vscode-dark pre code {
	color: #DDD;
}

.vscode-high-contrast,
.vscode-high-contrast pre code {
	color: white;
}

.vscode-light code {
	color: #A31515;
}

.vscode-dark code {
	color: #D7BA7D;
}

.vscode-light pre:not(.hljs),
.vscode-light code > div {
	background-color: rgba(220, 220, 220, 0.4);
}

.vscode-dark pre:not(.hljs),
.vscode-dark code > div {
	background-color: rgba(10, 10, 10, 0.4);
}

.vscode-high-contrast pre:not(.hljs),
.vscode-high-contrast code > div {
	background-color: rgb(0, 0, 0);
}

.vscode-high-contrast h1 {
	border-color: rgb(0, 0, 0);
}

.vscode-light table > thead > tr > th {
	border-color: rgba(0, 0, 0, 0.69);
}

.vscode-dark table > thead > tr > th {
	border-color: rgba(255, 255, 255, 0.69);
}

.vscode-light h1,
.vscode-light hr,
.vscode-light table > tbody > tr + tr > td {
	border-color: rgba(0, 0, 0, 0.18);
}

.vscode-dark h1,
.vscode-dark hr,
.vscode-dark table > tbody > tr + tr > td {
	border-color: rgba(255, 255, 255, 0.18);
}

.vscode-light blockquote,
.vscode-dark blockquote {
	background: rgba(127, 127, 127, 0.1);
	border-color: rgba(0, 122, 204, 0.5);
}

.vscode-high-contrast blockquote {
	background: transparent;
	border-color: #fff;
}
</style>

<style>
/* Tomorrow Theme */
/* http://jmblog.github.com/color-themes-for-google-code-highlightjs */
/* Original theme - https://github.com/chriskempson/tomorrow-theme */

/* Tomorrow Comment */
.hljs-comment,
.hljs-quote {
	color: #8e908c;
}

/* Tomorrow Red */
.hljs-variable,
.hljs-template-variable,
.hljs-tag,
.hljs-name,
.hljs-selector-id,
.hljs-selector-class,
.hljs-regexp,
.hljs-deletion {
	color: #c82829;
}

/* Tomorrow Orange */
.hljs-number,
.hljs-built_in,
.hljs-builtin-name,
.hljs-literal,
.hljs-type,
.hljs-params,
.hljs-meta,
.hljs-link {
	color: #f5871f;
}

/* Tomorrow Yellow */
.hljs-attribute {
	color: #eab700;
}

/* Tomorrow Green */
.hljs-string,
.hljs-symbol,
.hljs-bullet,
.hljs-addition {
	color: #718c00;
}

/* Tomorrow Blue */
.hljs-title,
.hljs-section {
	color: #4271ae;
}

/* Tomorrow Purple */
.hljs-keyword,
.hljs-selector-tag {
	color: #8959a8;
}

.hljs {
	display: block;
	overflow-x: auto;
	color: #4d4d4c;
	padding: 0.5em;
}

.hljs-emphasis {
	font-style: italic;
}

.hljs-strong {
	font-weight: bold;
}
</style>

<style>
/*
 * Markdown PDF CSS
 */

pre {
	background-color: #f8f8f8;
	border: 1px solid #cccccc;
	border-radius: 3px;
	overflow-x: auto;
	white-space: pre-wrap;
	overflow-wrap: break-word;
}

pre:not(.hljs) {
	padding: 23px;
	line-height: 19px;
}

blockquote {
	background: rgba(127, 127, 127, 0.1);
	border-color: rgba(0, 122, 204, 0.5);
}

.emoji {
	height: 1.4em;
}

/* for inline code */
:not(pre):not(.hljs) > code {
	color: #C9AE75; /* Change the old color so it seems less like an error */
	font-size: inherit;
}

</style>

</head>
<body>
<h1 id="vue-select-options">vue-select-options</h1>
<h2 id="appvue">App.vue</h2>
<pre class="hljs"><code><div><span class="hljs-tag">&lt;<span class="hljs-name">template</span>&gt;</span>
  <span class="hljs-tag">&lt;<span class="hljs-name">div</span> <span class="hljs-attr">id</span>=<span class="hljs-string">"app"</span>&gt;</span>
    <span class="hljs-tag">&lt;<span class="hljs-name">Select</span> @<span class="hljs-attr">onChange</span>=<span class="hljs-string">"onChange"</span>&gt;</span>
      <span class="hljs-tag">&lt;<span class="hljs-name">div</span> <span class="hljs-attr">class</span>=<span class="hljs-string">"option-box"</span>&gt;</span>
        <span class="hljs-tag">&lt;<span class="hljs-name">Option</span> <span class="hljs-attr">v-for</span>=<span class="hljs-string">"(item, index) in list"</span>
          <span class="hljs-attr">:key</span>=<span class="hljs-string">"index"</span>
          <span class="hljs-attr">:name</span>=<span class="hljs-string">"item.name"</span>
          <span class="hljs-attr">:checked</span>=<span class="hljs-string">"value === item.name"</span>&gt;</span>
          <span class="hljs-tag">&lt;<span class="hljs-name">Item</span>&gt;</span>
            {{'Item-' + item.name}}
          <span class="hljs-tag">&lt;/<span class="hljs-name">Item</span>&gt;</span>
        <span class="hljs-tag">&lt;/<span class="hljs-name">Option</span>&gt;</span>
      <span class="hljs-tag">&lt;/<span class="hljs-name">div</span>&gt;</span>
    <span class="hljs-tag">&lt;/<span class="hljs-name">Select</span>&gt;</span>
  <span class="hljs-tag">&lt;/<span class="hljs-name">div</span>&gt;</span>
<span class="hljs-tag">&lt;/<span class="hljs-name">template</span>&gt;</span>

<span class="hljs-tag">&lt;<span class="hljs-name">script</span>&gt;</span><span class="javascript">
<span class="hljs-keyword">import</span> Select <span class="hljs-keyword">from</span> <span class="hljs-string">'./components/SelectVue.vue'</span>
<span class="hljs-keyword">import</span> Option <span class="hljs-keyword">from</span> <span class="hljs-string">'./components/OptionVue.vue'</span>
<span class="hljs-keyword">import</span> Item <span class="hljs-keyword">from</span> <span class="hljs-string">'./components/OptionItem.vue'</span>

<span class="hljs-keyword">export</span> <span class="hljs-keyword">default</span> {
  <span class="hljs-attr">name</span>: <span class="hljs-string">'App'</span>,
  <span class="hljs-attr">components</span>: {
    Select,
    Item,
    Option
  },
  data () {
    <span class="hljs-keyword">return</span> {
      <span class="hljs-attr">list</span>: [
        {<span class="hljs-attr">name</span>: <span class="hljs-string">'Option-1'</span>},
        {<span class="hljs-attr">name</span>: <span class="hljs-string">'Option-2'</span>}
      ],
      <span class="hljs-attr">value</span>: <span class="hljs-string">''</span>
    }
  },
  <span class="hljs-attr">methods</span>: {
    onChange (val) {
      <span class="hljs-keyword">this</span>.value = val
      <span class="hljs-built_in">console</span>.log(val, <span class="hljs-string">'onChange'</span>)
    }
  }
}
</span><span class="hljs-tag">&lt;/<span class="hljs-name">script</span>&gt;</span>

<span class="hljs-tag">&lt;<span class="hljs-name">style</span>&gt;</span><span class="css">
<span class="hljs-selector-id">#app</span> {
  <span class="hljs-attribute">font-family</span>: Avenir, Helvetica, Arial, sans-serif;
  <span class="hljs-attribute">-webkit-font-smoothing</span>: antialiased;
  <span class="hljs-attribute">-moz-osx-font-smoothing</span>: grayscale;
  <span class="hljs-attribute">text-align</span>: center;
  <span class="hljs-attribute">color</span>: <span class="hljs-number">#2c3e50</span>;
  <span class="hljs-attribute">margin-top</span>: <span class="hljs-number">60px</span>;
}
</span><span class="hljs-tag">&lt;/<span class="hljs-name">style</span>&gt;</span>
</div></code></pre>
<h2 id="selectvuevue">SelectVue.vue</h2>
<pre class="hljs"><code><div><span class="hljs-tag">&lt;<span class="hljs-name">template</span>&gt;</span>
  <span class="hljs-tag">&lt;<span class="hljs-name">div</span> <span class="hljs-attr">class</span>=<span class="hljs-string">"select-vue"</span>&gt;</span>
    <span class="hljs-tag">&lt;<span class="hljs-name">p</span>&gt;</span>选中：{{checkName}}<span class="hljs-tag">&lt;/<span class="hljs-name">p</span>&gt;</span>
    <span class="hljs-tag">&lt;<span class="hljs-name">slot</span>/&gt;</span>
  <span class="hljs-tag">&lt;/<span class="hljs-name">div</span>&gt;</span>
<span class="hljs-tag">&lt;/<span class="hljs-name">template</span>&gt;</span>

<span class="hljs-tag">&lt;<span class="hljs-name">script</span>&gt;</span><span class="javascript">
<span class="hljs-keyword">export</span> <span class="hljs-keyword">default</span> {
  <span class="hljs-attr">name</span>: <span class="hljs-string">'SelectVue'</span>,
  <span class="hljs-comment">// 向下级组件注入</span>
  provide () {
    <span class="hljs-keyword">return</span> {
      <span class="hljs-attr">SelectVue</span>: <span class="hljs-keyword">this</span>,
      <span class="hljs-attr">checkValue</span>: <span class="hljs-keyword">this</span>.checkName,
      <span class="hljs-attr">SelectRoot</span>: <span class="hljs-keyword">this</span>.SelectRoot
    }
  },
  data () {
    <span class="hljs-keyword">return</span> {
      <span class="hljs-attr">checkName</span>: <span class="hljs-string">''</span>,
      <span class="hljs-attr">SelectRoot</span>: {
        <span class="hljs-attr">value</span>: <span class="hljs-string">''</span>
      }
    }
  },
  <span class="hljs-attr">methods</span>: {
    optionClick (event, vNode) {
      <span class="hljs-keyword">this</span>.checkName = vNode.name
      <span class="hljs-keyword">this</span>.emit()
    },
    emit () {
      <span class="hljs-keyword">this</span>.SelectRoot.value = <span class="hljs-keyword">this</span>.checkName
      <span class="hljs-keyword">this</span>.$emit(<span class="hljs-string">'onChange'</span>, <span class="hljs-keyword">this</span>.checkName)
    },
    <span class="hljs-comment">// 查找指定下级组件</span>
    getChildren ($children, tag) {
      <span class="hljs-keyword">let</span> arr = []
      <span class="hljs-keyword">if</span> (!$children || !$children.length) {
        <span class="hljs-keyword">return</span> arr
      }
      <span class="hljs-keyword">for</span> (<span class="hljs-keyword">let</span> i = <span class="hljs-number">0</span>; i &lt; $children.length; i++) {
        <span class="hljs-keyword">const</span> item = $children[i]
        <span class="hljs-keyword">if</span> (item.$options.name === tag) {
          arr.push(item)
        } <span class="hljs-keyword">else</span> {
          arr.push(...this.getChildren(item.$children, tag))
        }
      }
      <span class="hljs-keyword">return</span> arr
    }
  },
  created () {
    <span class="hljs-keyword">this</span>.$on(<span class="hljs-string">'optionClick'</span>, <span class="hljs-keyword">this</span>.optionClick)
    <span class="hljs-built_in">console</span>.log(<span class="hljs-keyword">this</span>.$children.length, <span class="hljs-string">'created $children.length'</span>)
  },
  mounted () {
    <span class="hljs-comment">// 子组件mounted后触发</span>
    <span class="hljs-keyword">let</span> $children = <span class="hljs-keyword">this</span>.getChildren(<span class="hljs-keyword">this</span>.$children, <span class="hljs-string">'OptionVue'</span>)
    <span class="hljs-built_in">console</span>.log($children.length, <span class="hljs-string">'mounted $children.length'</span>)
    <span class="hljs-keyword">if</span> ($children.length) {
      <span class="hljs-keyword">this</span>.checkName = $children[<span class="hljs-number">0</span>].name
      <span class="hljs-keyword">this</span>.emit()
    }
  }
}
</span><span class="hljs-tag">&lt;/<span class="hljs-name">script</span>&gt;</span>

<span class="hljs-tag">&lt;<span class="hljs-name">style</span> <span class="hljs-attr">scoped</span>&gt;</span><span class="css">
<span class="hljs-selector-class">.select-vue</span> {
  <span class="hljs-attribute">border</span>: <span class="hljs-number">1px</span> solid <span class="hljs-number">#ddd</span>;
  <span class="hljs-attribute">border-radius</span>: <span class="hljs-number">3px</span>;
}
</span><span class="hljs-tag">&lt;/<span class="hljs-name">style</span>&gt;</span>
</div></code></pre>
<h2 id="optionvuevue">OptionVue.vue</h2>
<pre class="hljs"><code><div><span class="hljs-tag">&lt;<span class="hljs-name">template</span>&gt;</span>
  <span class="hljs-tag">&lt;<span class="hljs-name">div</span> <span class="hljs-attr">class</span>=<span class="hljs-string">"OptionVue"</span>
    <span class="hljs-attr">:class</span>=<span class="hljs-string">"{'OptionVue-checked': checked}"</span>
    @<span class="hljs-attr">click</span>=<span class="hljs-string">"onClick"</span>&gt;</span>
    <span class="hljs-tag">&lt;<span class="hljs-name">slot</span> <span class="hljs-attr">v-if</span>=<span class="hljs-string">"$slots.default"</span>/&gt;</span>
    <span class="hljs-tag">&lt;<span class="hljs-name">span</span> <span class="hljs-attr">v-else</span>&gt;</span>{{name}}<span class="hljs-tag">&lt;/<span class="hljs-name">span</span>&gt;</span>
  <span class="hljs-tag">&lt;/<span class="hljs-name">div</span>&gt;</span>
<span class="hljs-tag">&lt;/<span class="hljs-name">template</span>&gt;</span>

<span class="hljs-tag">&lt;<span class="hljs-name">script</span>&gt;</span><span class="javascript">

<span class="hljs-keyword">export</span> <span class="hljs-keyword">default</span> {
  <span class="hljs-attr">name</span>: <span class="hljs-string">'OptionVue'</span>,
  <span class="hljs-comment">// 基础数据类型不响应，object类型可以watch</span>
  inject: [<span class="hljs-string">'SelectVue'</span>, <span class="hljs-string">'checkValue'</span>, <span class="hljs-string">'SelectRoot'</span>], <span class="hljs-comment">// 接收上级组件注入</span>
  props: {
    <span class="hljs-attr">checked</span>: {
      <span class="hljs-attr">type</span>: <span class="hljs-built_in">Boolean</span>,
      <span class="hljs-attr">default</span>: <span class="hljs-literal">false</span>
    },
    <span class="hljs-attr">name</span>: {
      <span class="hljs-attr">type</span>: <span class="hljs-built_in">String</span>,
      <span class="hljs-attr">default</span>: <span class="hljs-string">''</span>
    }
  },
  data () {
    <span class="hljs-keyword">return</span> {
      <span class="hljs-attr">selectVueVNode</span>: <span class="hljs-literal">null</span>
    }
  },
  <span class="hljs-attr">watch</span>: {
    <span class="hljs-comment">// 无效</span>
    <span class="hljs-string">'checkValue'</span>: <span class="hljs-function"><span class="hljs-keyword">function</span> (<span class="hljs-params">nVal</span>) </span>{
      <span class="hljs-built_in">console</span>.log(nVal, <span class="hljs-string">'watch checkValue -- '</span> + <span class="hljs-keyword">this</span>.name)
    },
    <span class="hljs-comment">// // inject Object</span>
    <span class="hljs-comment">// 'SelectRoot': {</span>
    <span class="hljs-comment">//   handler: function (nVal) {</span>
    <span class="hljs-comment">//     console.log(nVal, 'watch SelectRoot -- ' + this.name)</span>
    <span class="hljs-comment">//   },</span>
    <span class="hljs-comment">//   deep: true</span>
    <span class="hljs-comment">// },</span>
    <span class="hljs-comment">// // vNode data</span>
    <span class="hljs-comment">// 'selectVueVNode.checkName': function (nVal) {</span>
    <span class="hljs-comment">//   console.log(nVal, 'watch selectVueVNode.checkName -- ' + this.name)</span>
    <span class="hljs-comment">// },</span>
    <span class="hljs-string">'selectVueVNode.SelectRoot'</span>: {
      <span class="hljs-attr">handler</span>: <span class="hljs-function"><span class="hljs-keyword">function</span> (<span class="hljs-params">nVal</span>) </span>{
        <span class="hljs-built_in">console</span>.log(nVal.value, <span class="hljs-string">'selectVueVNode.SelectRoot watch in -- '</span> + <span class="hljs-keyword">this</span>.name)
      },
      <span class="hljs-attr">deep</span>: <span class="hljs-literal">true</span>
    }
  },
  <span class="hljs-attr">methods</span>: {
    <span class="hljs-comment">// 查找指定上级组件</span>
    getParent ($parent, tag) {
      <span class="hljs-keyword">if</span> (!$parent || $parent === <span class="hljs-keyword">this</span>) {
        <span class="hljs-keyword">return</span> <span class="hljs-literal">null</span>
      }
      <span class="hljs-keyword">if</span> ($parent.$options.name === tag) {
        <span class="hljs-keyword">return</span> $parent
      } <span class="hljs-keyword">else</span> {
        <span class="hljs-keyword">return</span> <span class="hljs-keyword">this</span>.getParent($parent.$parent, tag)
      }
    },
    onClick () {
      <span class="hljs-keyword">this</span>.selectVueVNode &amp;&amp; <span class="hljs-keyword">this</span>.selectVueVNode.$emit(<span class="hljs-string">'optionClick'</span>, <span class="hljs-keyword">this</span>.name, <span class="hljs-keyword">this</span>)
      <span class="hljs-keyword">this</span>.$emit(<span class="hljs-string">'optionClick'</span>, <span class="hljs-keyword">this</span>.name)
    }
  },
  created () {
    <span class="hljs-comment">// 获取上级SelectVue对象vNode</span>
    <span class="hljs-keyword">this</span>.selectVueVNode = <span class="hljs-keyword">this</span>.SelectVue || <span class="hljs-keyword">this</span>.getParent(<span class="hljs-keyword">this</span>.$parent, <span class="hljs-string">'SelectVue'</span>)
    <span class="hljs-built_in">console</span>.log(<span class="hljs-keyword">this</span>.selectVueVNode, <span class="hljs-string">'created selectVueVNode'</span>)
    <span class="hljs-built_in">console</span>.log(<span class="hljs-keyword">this</span>.$parent, <span class="hljs-string">'created $parent'</span>)
  },
  mounted () {
    <span class="hljs-built_in">console</span>.log(<span class="hljs-keyword">this</span>.$parent, <span class="hljs-string">'mounted $parent'</span>)
  }
}
</span><span class="hljs-tag">&lt;/<span class="hljs-name">script</span>&gt;</span>

<span class="hljs-tag">&lt;<span class="hljs-name">style</span> <span class="hljs-attr">scoped</span>&gt;</span><span class="css">
<span class="hljs-selector-class">.OptionVue</span> {
  <span class="hljs-attribute">cursor</span>: pointer;
}
<span class="hljs-selector-class">.OptionVue-checked</span> {
  <span class="hljs-attribute">background</span>: <span class="hljs-number">#eee</span>;
}
</span><span class="hljs-tag">&lt;/<span class="hljs-name">style</span>&gt;</span>
</div></code></pre>
<h2 id="optionitemvue">OptionItem.vue</h2>
<pre class="hljs"><code><div><span class="hljs-tag">&lt;<span class="hljs-name">template</span>&gt;</span>
  <span class="hljs-tag">&lt;<span class="hljs-name">div</span> <span class="hljs-attr">class</span>=<span class="hljs-string">"OptionItem"</span>&gt;</span>
    <span class="hljs-tag">&lt;<span class="hljs-name">slot</span>/&gt;</span>
  <span class="hljs-tag">&lt;/<span class="hljs-name">div</span>&gt;</span>
<span class="hljs-tag">&lt;/<span class="hljs-name">template</span>&gt;</span>

<span class="hljs-tag">&lt;<span class="hljs-name">script</span>&gt;</span><span class="javascript">

<span class="hljs-keyword">export</span> <span class="hljs-keyword">default</span> {
  <span class="hljs-attr">name</span>: <span class="hljs-string">'OptionItem'</span>,
  <span class="hljs-attr">inject</span>: [<span class="hljs-string">'SelectVue'</span>], <span class="hljs-comment">// 接收上级组件注入</span>
  methods: {
    getParent ($parent) {
      <span class="hljs-keyword">if</span> (<span class="hljs-keyword">this</span>.SelectVue) {
        <span class="hljs-keyword">return</span> <span class="hljs-keyword">this</span>.SelectVue
      }
      <span class="hljs-comment">// 根据vNode向上查找</span>
      <span class="hljs-keyword">if</span> (!$parent || $parent === <span class="hljs-keyword">this</span>) {
        <span class="hljs-keyword">return</span> <span class="hljs-literal">null</span>
      }
      <span class="hljs-keyword">if</span> ($parent.$option.name === <span class="hljs-string">'SelectVue'</span>) {
        <span class="hljs-keyword">return</span> $parent
      } <span class="hljs-keyword">else</span> {
        <span class="hljs-keyword">return</span> <span class="hljs-keyword">this</span>.getParent($parent.$parent)
      }
    },
    onClick () {
      <span class="hljs-keyword">let</span> vNode = <span class="hljs-keyword">this</span>.getParent(<span class="hljs-keyword">this</span>.$parent)
      vNode &amp;&amp; vNode.$emit(<span class="hljs-string">'optionClick'</span>, <span class="hljs-keyword">this</span>.name, <span class="hljs-keyword">this</span>)
      <span class="hljs-keyword">this</span>.$emit(<span class="hljs-string">'optionClick'</span>, <span class="hljs-keyword">this</span>.name)
    }
  },
  created () {
    <span class="hljs-built_in">console</span>.log(<span class="hljs-keyword">this</span>.SelectVue, <span class="hljs-string">'created $parent.$parent inject SelectVue'</span>)
  }
}
</span><span class="hljs-tag">&lt;/<span class="hljs-name">script</span>&gt;</span>

<span class="hljs-tag">&lt;<span class="hljs-name">style</span> <span class="hljs-attr">scoped</span>&gt;</span><span class="css">
<span class="hljs-selector-class">.OptionItem</span> {
  <span class="hljs-attribute">border-top</span>: <span class="hljs-number">1px</span> solid <span class="hljs-number">#ddd</span>;
}
</span><span class="hljs-tag">&lt;/<span class="hljs-name">style</span>&gt;</span>
</div></code></pre>

</body>
</html>
